- iChat (for the Mac)(compatible with your GoogleTalk account)
- GoogleTalk(Windows only but compatible with iChat)
- Windows Live Messenger (Windows)(Mac)
- Yahoo Messenger
- AIM (AOL Instant Messenger)
Each of these has their own set of challenges, and the possibility of being blocked.
Another great tool you can use for video conferencing with guest lecturers is Wimba. A tool available to all Utah Educators. You can learn more at www.uen.org/wimba